#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); i++)
using namespace std;
typedef long long ll;
#define bit(n,k) ((n>>k)&1)

int main(){
    cin.tie(0);
    ios::sync_with_stdio(0);

    ll N; cin >> N;
    if(N == 2){ cout << "INF" << endl; return 0; }
    if(N == 3 || N == 4){ cout << 6 << endl; return 0; }
    if(N == 5 || N == 6){ cout << 4 << endl; return 0; }
    cout << 2 << endl;
}